%0 Journal Article %A Charles F. Osgood %T Product Type Bounds on the Approximation of Values of E and G Functions. %J Monatshefte für Mathematik %D 1986 %P 7-26 %V 102 %I mathdoc %U http://geodesic.mathdoc.fr/item/MOMA_1986__102_178286/ %F MOMA_1986__102_178286